Mixing machine



July 8, 1924. 1,500,322

P. D. IONIDES MIXING MACHINE -Filed Dec. 8, 1923 2 Sheets-Sheet 1 l/VVAWiU/P FD l rva/es July 8 1924. 1.500322 1 V v P. D. IONIDES MIXING MAcHima Filed Dec. 8. 1923 2 Shee tS Shet 2 ma/z/vm? P0 [On/@2 5.

by v M aw Patented July 8, 1924.

UNITED STATES PATENT OFFICE.

PHILIP DENIS IONIDES, F IPSWICH, ENGLAND, ASSIGNOR OF ONE-HALF '10 BAN- SOME MACHINERY COMPANY (1920) LIMITED, OF LONDON, ENGLAND.

MIXING MACHINE.

Application filed December 8, 1928. Serial No. 679,381.

To all whom it ma concern:

Be it known that PHILIP Dams IONIDES, a subject of the Kin of Great Britain, residing at Waterside TVorks, Ipswich, 1n the 6 county of Suffolk, England, have invented new and useful Improvements Relating to Mixing Machines, of which the following is a s ecification.

his invention has reference to mixing 10 machines more particularly adapted for the production of concrete mortar or similar mixtures for building and constructional purposes.

The object of the invention is to provide an improved apparatus in which the operation-of combinin the various ingredients to be mixed shall e efi'ected thoroughly and expeditiously and in such a manner that the material is moved in a number of directions to obtain movements which are of great advantage in securing an intimate commingling of the several ingredlents.

The invention is concerned with mixing machines of the now well-known rotary drum type in which the drum is so mounted as to be'rotatable around an inclined axis during the mixing operation and to betilted into suitable positions for charging and discharging.

In accordance with the present invention the drum comprises a frusto-conical upper wall an annular wall joining said upper wall and a base or bottom portion the interior surface of which is curved so as to merge 3| into the aforesaid annular wall and into a tubular bearing risin from the middle of the bottom of the rum. -A number of radially disposed ribs or projections are provided upstanding from the curved bot- 0 tom of the drum and the contour of said ribs is also curved so as to merge into the parts of the drum adjacent the ribs.

By such construction it will be manifest that there are no flat surfaces in the bottom of the drum and no corners or angles in which accumulations of the material mixed can lodge. A

Secured to the interior of the drum preferably diagonally with respect to its axis of 60 rotation are appropriate blades which cooperating with the aforesaid radial ribs or projections cause the contents of the drum during the mixing operation to move in a number of different directions thereby ensuring a thorough and intimate commingling of the several ingredients.

As is usual in machlnes of the type to which this invention relates the drum is supported upon a yoke having a spindle adapted to enter the aforesaid tubular bearing rising from the middle of the bottom of the drum. The yoke is journalled in a frame or staging in such a manner that by swinging the yoke the drum can be tilted to the desired positions for charging mixing. and dischargmg. Rotary motion 1s imparted to the drum by an annular gear on the drum adapted to engage a gear wheel or pinion mounted upon the frame of the machine and driven in anysuitable manner.

The framing or staging is mounted upon two wheels and in such a position as will approximate with a line through the centre of gravity so that the machine is more or less balanced on the wheels thus rendering it more mobile and enabling it to be transported from place to place with the minimum of effort while'it may be also turned practically upon its own axis.

In order that the invention may be clearly understood reference will now be had to the accompanying drawings wherein the pre ferreol construction is illustrated by way of example.

Figure 1 is a plan view of the mixing drum.

Figure 2 is an elevation of the drum partly in section.

Fi ure 3 is a further view showing the positlon of the blades the drum being inflthe tilted position.

machine, and

Figure 5 is a side elevation modified form of machine.

Referring to the drawings wherein the same reference letters indicate the same or similar parts a; represents the mixing drum as a whole. It comprises a frustro-conical upper wall I) an annular wall 0 joining said upper wall and a base or bottom portion d; The portion 03 is curved so as to merge into the annular wall 0 and into a tubular bearing 6 rising from the middle of the bottom of a slightly Figure 4 is a' view showing a complete v of the drum a. The bottom of the drum is ner there are no corners or angles in which the materials being mixed can accumulate and furthermore there are no fiat surfaces on the bottom portion of the drum.

Secured to the interior of the drum by straps g are pairs of mixing blades 71. dia

onally disposed with respect to the upstan ing bearing e one end of each of the outer blades being provided with 'a bent or offset portion 3 During the mixing operation the blades h co-operate with the ribs or projections f and cause the materials being mixed to move in a number of different directions whereby an intimate and thorough commingling of the ingredients is obtained.

The drum a as is usual in machines of the type to which this invention relates is supported upon a yoke 2' having a spindle which enters the tubular bearing e. The yoke i is journalled in a frame j and is provided with a toothed wheel or sector is with which a pinion Z Figure 5 engages said pinion being operated by a handle m whereby the yoke z and the drum a can be tilted to t e desired positions for charging mixing and discharging.

The drum a is provided with an annular gear at in engagement with a pinion 0 driven rom an engine or other power source 9 carried on the frame j through the intermediacy of a belt chain or the like and pulley p whereby the drum is rotated in the desired direction.

It will be understood that in the mixing of concrete the sand aggregate and cement are charged into the open mouth of the drum while rotating which for this purpose is tilted into the position shown in Figures 4 and 5 and water supplied either before or after.

It has been found that considerable difficulty is experienced in adding the water through a relatively small supply pipe either before or after the dry material has been in troduced for the reasons that owing to the length of time necessarily occupied in introducing the water and in tilting the drum to the mixing position there is a tendency for the cement to accumulate in lumps which are liable to impair the quality of the concrete. This disadvantage is obviated according to the present invention by providing a suitable tank or reservoir 1- located on t e frame'j above the drum (1 and provided with pipes t Figure 4 or a pipe it Figure 5 and a valve preferably hand-operated and adapted to rapidly introduce a predetermined quantity of water into the drum whereupon the drum is at once tilted to the mixing position while practically upon its own axis. If desired the frame may be carried on four wheels the EOSltlOIlS of said wheels being indicated in roken lines in Figure 5.

To secure the necessary rigidity so that vibration may be prevented from causing shifting or creeping of the whole structure whilst the machine is in use screw jacks u are mounted on the frame 9' in such manner that they can be quickly raised and lowered. When the jacks are engaged with the ground or other surface upon which the machine is standing the machine will be secured against any substantial movement. If desired the screw jacks may be located at the opposite end of the machine to that shown in Fig ures 4 and 5.

A skip Q; is also provided for charging the drum (1 said skip being adapted to travel on tracks to on the frame 7'.

If desired pull-bars a: maybe detachably secured to the frame j for hauling purposes.

A mixing machine constructed in accordance with this invention is very eflicient in operation and an intimate commingling of the several ingredients is obtained whilst the machine is capable of treating large quantities of materials expeditiously. Furthermore the machine can be easily and quickly moved from one place to another with the minimum of effort and when in position can be retained therein against any substantial movement.

I claim A mixing machine having a drum comprising a frusto-conical upper wall, an annular wall joining said upper wall a base or bottom portion the interior surface of which is curved so as to merge into the aforesaid annular wall and into a tubular bearing rising from the bottom of the drum and a number of ribs or rojections standing from the curved bottom of the drum the contour of said ribs being also curved so as to merge into the parts ofthe drum adjacent the ribs.

2. A mixing machine having a drum comprising a frusto-conical upper wall, an annular-wall joining said upper wall a base or bottom portion the interior surface of which is curved so as to merge into the aforesaid annular wall and into a tubular bearin rising from the bottom of the drum, a num er of ribs or projections upstanding from the curved bottom of the drum the contour of said ribs being also curved so as to merge into the parts of the drum adjacent the ribs and blades on said drum arranged diagonally with respect to the} axis of the rotation of the drum said blades co-operating with the ribs to cause the contents of the drum during the mixing opera tion to move in a number of different directions so as to ensure an intimate commingling of the several ingredients.

3. A mixing machine having a drum comprising a frusto-conical upper wall an annular wall joining said upper wall a base or bottom portion the interior surface of which is curved so as to merge into the aforesaid annular wall and into a tubular bearing rising from the bottom of the drum a number of radially disposed ribs or projections upstanding from t e curved bottom of the drum the contour of said ribs being also curved so as to merge into the parts of the drum adjacent the ribs and blades on said drum arranged diagonally with respect to the axis of rotation of the drum said blades co-operating with the ribs to cause the contents of the drum during the mixing operation to move in a number of different directions so as to ensure an intimate commingling of the several ingredients.

' 4. A mixing machine having a drum comprising a frusto-conical upper wall an annular wall joining said upper wall a base or bottom portion the interior surface of which is curved so as to merge into the aforesaid annular wall and into a tubular bearing rising from the bottom of the drum, a number of ribs or projections u standing from the curved bottom of the rum the contour of said ribs being also curved so as to merge into the parts of the drum adjacent the ribs and blades on said drum arranged diagonally with respect to the axis of rotation of the drum said blades cooperating with the ribs to cause the contents of the drum to move in'a number of different directions so as to ensure an intimate commingling of the several ingredients some of said blades having a bent or ofl'set portion.

PHILIP DENIS IONIDES. 

